Women are the fastest growing segment of farm operators in the United States, comprising approximately 14% of principal operators and 30% of all operators of the nation's 2.2 million farms. Although several studies have examined the adoption of conservation practices by farmers, no study of which we are aware has focused on the use of conservation practices among women farmers in the US. Therefore, in 2008, we conducted a survey of women farmers in the Northeast US to better understand their use of conservation practices, and how their use is affected by demographic and farm characteristics, and membership in agricultural organizations and networks. We examined the practices related to the type of agricultural organizations, including commodity producer organizations, general farm organizations, women's groups associated with general farm or commodity organizations, farm women's organizations, and sustainable/organic agriculture organizations. Over 85% of the 815 respondents belonged to at least one organization. The most common organizations reported were sustainable/organic agriculture organizations (53.5%) and general farm organizations (50.8%). About one-third of respondents belonged to commodity-based organizations. The states with organized women farmers' networks—Pennsylvania, Maine and Vermont—represented more than half of them. Members of women's and sustainable or organic agriculture organizations tended to be younger, have less farming experience, and to have received more formal agricultural education than did members of commodity-based, general farm and women's agricultural groups within general farm organizations. Our results indicate that organizational membership and participation provide critical networks that support and reinforce the use of conservation practices. Some practices were positively associated with one type of organization while negatively associated with others. For example, compost production/application, crop rotation, manure incorporation, and organic crop and livestock production are more likely among members of sustainable/organic agriculture organizations, but less likely among members of general farm organizations. The converse is true for integrated pest management (IPM) on crop farms. Specific conservation practices had unique sets of variables linked to their use, with farm products being the most frequent predictors. This research serves as a baseline to understand the array of conservation practices used by women farmers in the Northeast US, and some factors associated with their use. The results suggest the need for consideration of the applicability of existing adoption models for women farmers. As women tend to have diversified operations with multiple markets, educational and regulatory programs that attempt to reach women farmers may need to consider the specific types of farms they operate to best match practices to their situations and goals.

Nowadays, the maize weevil Sitophilus zeamais—Motsch 1855 is the most relevant pest found during storage of maize grains. Aiming at protecting the agricultural crops, high amounts of synthetic pesticides are used around the world. In this sense, this work aimed at evaluating the insecticidal and repellent effect of essential oil of Ocotea odorifera (Vellozo) Rohwer (Lauraceae) (O. odorifera (sassafras)) leaves against the maize weevil in maize grains. The essential oil's chemical composition showed that sassafras contains camphor (43%) and safrole (42%) as major compounds. Our results show that sassafras oil was insecticidal and repellent to maize weevil. About 100% mortality was achieved using a concentration of 0.32 μl cm−2, after 24 h of exposure. The LD50 value was 14.1 μl or 0.09 μl cm−2 and the study of the effect on insect mortality at the lethal doses (LD50) showed that after 72 h mortality was 100%. The values of the preference index varied from −0.39 (0.065 μl cm−2) to −0.63 (0.659 μl cm−2), demonstrating that the plant oil presents repellent activity. The repellency bioassay simulating small bins showed the repellent effect level from 0.64 (0.36 μl cm−3) to 0.94 (2.9 μl cm−3). The essential oil of sassafras presented insecticidal and repellency against maize weevil. Although from an economical point of view synthetic chemicals are still more frequently used as repellents, natural products (essential oils) have the potential to provide efficient and safer repellents for humans and the environment.

In Brazil, as well as globally, land use has been increasingly addressed for environmental impacts and economic improvements. Integrated crop–livestock systems (ICLSs) are a potential strategy to optimize use of land, increase total production and reduce economic risk through diversification. We compared production and economic outcomes of a soybean-only system with ICLS differing in sward management. The study area was managed since 2001 using no-till in southern Brazil. Soybean [Glycine max (L.) Merr.] was rotated with a mixture of black oat (Avena strigosa Schreb) and ryegrass (Lolium multiflorum Lam) either for: (i) grazing (ICLS) or (ii) cover crops as cropping system only (CS) with no livestock grazing. Four sward height management methods (10, 20, 30 or 40 cm) were evaluated under put-and-take stocking. Across years, soybean yield (2516±103 kg ha−1) was not affected by treatment, but was affected by year (P<0.001), due to rainfall during crop development. Cattle average daily gain, gain per hectare (GPH) and gross margin were affected by treatments (P<0.001). Average daily gain was lower when pasture was managed at 10 cm than between 20 and 40 cm. With increasing sward height, a gradual reduction in cattle GPH was observed (P<0.05). Overall gross margin was lower in CS than in ICLS. Economic return with ICLS was greatest when sward height management was between 10 and 20 cm. Our study indicates that ICLS could be considered an alternative management strategy that improves economic performance and promotes balanced production in the long term.

The objective of this research is to develop an economic analysis of different crop mix biofuels programs for meeting ethanol and sustainability demands. Primary data are from South Dakota State University field experiments on farms located in east-central South Dakota. The data include 4 years of field data, three crop systems (mixed grass, switchgrass and corn), two residue treatments (no removal, removal of biomass), and three landscape positions (back slope, crest and foot slope). A representative farm model and five scenarios are developed to conduct a full budget analysis over a 12-year period. Public benefits are evaluated, using the benefit transfer method to value ecosystem services, by allocating a dollar value to three environmental variables; carbon sequestration, reduction of sedimentation and pheasant production. Stochastic simulation results are compared for each of the five scenarios, one with only annualized net private returns, and one including the value of environmental benefits. Results indicate that: (1) the conventional continuous corn scenario has the highest net returns over the 12-year budget, (2) carbon sequestration represents 80% of the environmental benefits, and (3) the added economic value of ecosystem services does not provide enough incentives for farmers to convert from corn production to grass production.

This study evaluated the most significant physical, chemical and biological soil properties from a group of organic olive farms located in a typical olive-growing area of Andalusia, Spain, after 5 or more years since the shift from conventional to organic farming, and compared soils with those in nearby undisturbed (U) natural areas. Two soil management systems implemented in these organic olive farms to control weeds, tillage (T), characterized by non-inverting-shallow tillage in spring, and mechanical mowing (M), were compared and evaluated against the U areas. Organic olive orchards showed similar productivity (average fruit yield of 3130 kg ha−1 yr−1) as the conventional, rain-fed olive groves in the same area, with no significant differences due to soil management systems. Soil properties in the olive orchards (i.e. texture, pH, organic carbon (C), organic nitrogen (N), C:N ratio, cation exchange capacity (CEC) and exchangeable potassium) were in the suitable range for olive farming in both soil managements, although organic C and N, saturated hydraulic conductivity and available water-holding capacity (AWC) of the soil were lower than in the U areas. A principal component analysis (PCA) for soil properties in topsoil (0–10 cm depth) distinguished the T from M olive orchards and U areas, and determined organic C and N as the most significant soil properties to characterize them. Average values of soil organic carbon (SOC) stocks for the surface layer (0–10 cm depth) were 18.6, 59.3 and 67.8 Mg ha−1, for T and M soil management systems and U areas, respectively. This indicates that the sustainability of organic olive orchards could be significantly improved by shifting to M soil management to decrease soil erosion and depletion of SOC.

The Fertile Crescent encompasses a mega-center of diversity of crops and livestock of global importance. The International Center for Agricultural Research in the Dry Areas (ICARDA) coordinated a 5-year regional project funded by the Global Environment Facility to promote in situ conservation of dryland agrobiodiversity in Jordan, Lebanon, the Palestinian Authority and Syria. The project focused on conserving landraces and wild relatives of Allium, Vicia, Trifolium, Medicago and Lathyrus spp. and barley, wheat, lentil and dryland fruit trees (olive, prune, pear, pistachio, almond, cherry and apricot). ICARDA and national programs assessed the status and importance of local agrobiodiversity by surveying 570 farm households in the project target areas including the characterization of their livelihood strategies, agrobiodiversity use and household income sources. A wealth index was created considering human, natural, financial, physical and social assets and was used to classify households into four wealth quartiles. The results indicated that agriculture and agrobiodiversity continue to be important for supporting the livelihoods of poor communities in dry and mountainous regions. The poorest households obtained their income from diverse sources including crop production, off-farm labor and government employment. However, households in the highest wealth grouping are mainly dependent on income from selling livestock products and live animals. They also practiced crop production, worked off-farm and took advantage of government employment. Off-farm income was important for livelihoods in all areas, representing 43–68% of household incomes. For all groups, fruit trees were generally more important than field crops for income generation, mainly in mountainous areas. The finding of this study showed that all farmers’ groups contribute greatly to on-farm conservation of landraces, with a bigger role for poor farmers in conserving the landraces of fruit trees. Diversification of income and farming systems to include livestock, field crops and fruit trees along with off-farm activities are contributing to the conservation of agrobiodiversity in these marginal environments. Several opportunities for income increase and diversification through add-value activities and alternative sources of income are demonstrated to the custodians of dryland agrobiodiversity. Their benefits can contribute to the sustainability of agrobiodiversity conservation, provided that marketing of local products can be enhanced.

This study attempts to enrich the debate on the different forms of risk management strategies that are utilized by organic farmers and to assess the internal dynamics within the organic farming community by examining the attitudes and practices of these farmers. In particular, using a factor analysis, this study determines the attitudes of Greek farmers toward risk management strategies and focuses on the differences in risk attitudes between existing organic farmers and non-organic farmers. Second, using a probit analysis, this study characterizes the key factors that affect Greek farmers' attitudes with respect to risk management strategies. The thorough presentation of this research study provides essential information to policy-makers for understanding the factors that induce farmers to participate in organic agriculture. Moreover, the analysis of the risk management strategies that organic farmers apply is expected to offer valuable insights that will be critical for the timely introduction and efficient application of the forthcoming post-2013 Common Agricultural Policy (CAP) measures.

Research to understand and manage ecosystems to supply services has recently spurred a functional view of their biodiversity. In particular, approaches based on functional traits rather than species diversity are increasingly used to reflect interactions between organisms and their environment. These approaches bring a functional perspective to the study of community structure responses to disturbances and resources, and of their effects on ecosystem functioning and services. From an academic perspective, we propose a conceptual framework based on species functional traits to better infer how grassland management practices (fertilization, defoliation regime) along with abiotic factors influence plant, animal and microbial community composition and a range of services in grassland ecosystems. The core of the framework relies on combinations of plant functional traits and associated microbial features that specifically respond to environmental and management factors and influence ecosystem services. To overcome stakeholders’ difficulty in applying the concept of functional traits, we propose an operational approach implying the mapping of plant communities distributed into five plant functional types (PFTs). The approach was used for fields in grassland-based livestock farms from two French grassland networks. We evaluated its ability to predict a range of services including forage provision and non-market services according to environmental and management drivers. PFT-based plant community composition predicted forage services reasonably well but responded weakly to environmental gradients. To cope with the observed limitations of current predictive approaches, we suggest including soil microbial functional types and adaptive management rather than using a prescriptive scheme.

Current agricultural and food systems literature suggests multiple opportunities for improving systemic sustainability. Especially in the popular press, many authors have conceptualized a return to smaller scale diversified production as a strategy to feed America sustainably. This study explores this notion for components of our meat supply using approaches reported in one of the most popular of these books, Michael Pollan's The Omnivore's Dilemma, as a touchstone. We examine the land footprint and number of farms required to produce beef, chicken and eggs for the state of Michigan (a population just under 10,000,000) using similar production strategies to those outlined in Pollan's book. To feed Michigan's population at a scale of production demonstrated on the highlighted farm in Pollan's book, and an average level of Midwest intake for beef, chicken and eggs would require approximately 3600 farms and 6.5 million acres of farmland to produce 100% of the beef, 100% of the eggs and about 50% of the broiler chickens for this population. The strategy is discussed in reference to existing farms and acreage in Michigan and put in the context of sustainability within our food supply.

During the winter feeding period in organic dairy production systems in the alpine and pre-alpine regions of Austria and its neighboring countries, maize silage is an energy-rich forage that is regularly included in grass-silage-based diets to improve the energy supply of the cows. Italian ryegrass (Lolium multiflorum Lam.) is also a high-energy fodder grass popular as forage for dairy cows, but it is rarely cultivated in Austrian organic agriculture. The two crops differ in their cultivation demands and characteristics. Italian ryegrass establishes rapidly and may reduce the risk of soil erosion. Italian ryegrass would be a beneficial addition to crop rotation, which is an essential tool in successful organic farming. In a 15-week feeding trial, Italian ryegrass silage and maize silage were fed to 22 lactating Holstein dairy cows. Organically produced Italian ryegrass silage and maize silage were included at a rate of 40% [of dry matter (DM)] in grass-silage-based mixed basal diets. The mixed basal diets were supplemented with modest amounts of additional concentrates (2.7–3.0 kg DM day−1). Owing to the higher energy content of maize silage as compared to Italian ryegrass silage, the maize diet provided more energy [6.3 MJ net energy for lactation (NEL) kg−1 DM] than the ryegrass diet (6.15 MJ NEL kg−1 DM). The protein supply of the maize diet and the ryegrass diet was intended to be equal, but in fact the protein content of the maize diet was significantly lower (122 g crude protein kg−1 DM) than that of the ryegrass diet (141 g kg−1 DM). When the maize diet was fed, feed intake, milk yield and milk protein content were significantly higher as compared to the ryegrass diet. Also, intake of crude protein was significantly lower when feeding the maize diet, and in combination with the higher milk protein yield, this enabled an efficiency of gross nitrogen (N) utilization as high as 0.304. This level of N efficiency can be considered as above average and was significantly and considerably higher than the level of 0.259 observed when the ryegrass diet was fed. Therefore, maize silage upholds its reputation as an ideal energy-rich component in grass-silage-based dairy cow diets.

An agricultural facility aimed at sustainable production of crops in arid environments was built and tested in Hatzeva, Israel. The facility relies on solar-powered desalination with nanofiltration membranes to treat the local brackish water (EC=2.32 dS m−1) and produce high-quality irrigation water (EC=0.71 dS m−1). Red beet, a salt-tolerant crop, was grown with the concentrate stream (EC=4.73 dS m−1), eliminating the need for concentrate disposal and with potential net economic benefits. Agricultural experiments with variable irrigation water quality, application rate, and four staple crops (potato, maize, millet and sorghum) were conducted over two growing seasons between September 2010 and June 2011. The desalination plant operated at low pressure (4.3 bar) and energy consumption (1.37 kWh m−3) and with little maintenance over the entire study period. The results of the agricultural experiments consistently showed that irrigation with desalinated water promoted more efficient use of resources such as water and inorganic fertilizers. A reduction of 25% in the irrigation rate and use of fertilizers compared with best-practice guidelines was achieved with desalinated water, with no detectable detrimental effect on the marketable yield. On the contrary, a statistically significant yield increase was observed for sorghum (+10%). An increase in water productivity with desalinated water was observed for all four staple crops.

Stale seedbeds are used by organic growers to reduce weed populations prior to crop planting. Rye mulches, derived from mechanically killed (rolled and crimped) winter rye cover crops, can serve the same purpose for spring-planted organic crops. Both methods can also be employed by conventional growers who face looming problems with herbicide resistant weeds. The objective of this research was to compare these methods over 2 years in central Minnesota in terms of weed seedling emergence, populations, biomass and manual-weeding times, as well as stands and yields of short-season and full-season soybean varieties planted late, in mid June. Rye mulch greatly lowered both pre- and post-planting weed populations of common annual weeds, which substantially affected necessity for augmented weed control. For instance, the need for within-crop manual-weeding was low for soybean planted into rye mulch (0–6 h ha−1), but ranged from 15 to 66 h ha−1 of labor for soybean planted in stale seedbeds and augmented by inter-row cultivation. However, rye mulch lowered soybean yield potential by 800–1000 kg ha−1 compared with stale seedbeds in 1 of 2 years. With organic feed-grade soybean seed valued at $1 kg−1, conventional soybean seed at $0.5 kg−1, and labor for manual-weeding at $10 h−1, the use of rye mulch compared with stale seedbeds augmented by manual-weeding are equally rational choices for organic growers in central Minnesota (assuming labor is available for hand-weeding), but rye mulches probably would be a wise financial option for conventional growers compared with hand-weeding. Lastly, full-season soybean had higher yields than short-season soybean and probably represents a prudent selection in central Minnesota, regardless of the late planting date requirements for both the rye mulch and stale seedbed systems.

Defining the balance between socio-economical and bio-physical aspects in order to promote sustainable development in agriculture is a fundamental challenge for researchers. The aim of this study is to assist in constructing a science of sustainability in agriculture and to assess sustainability in various types of agroecosystem managements characterized by different agricultural and rural developments. This study evaluates sustainability on Terceira Island (Portugal) and in the Province of Viterbo (Italy) by using selected agroecosystem sustainability indicators capable of achieving an energetic and monetary input/output analysis. Overall, results showed two rural and agricultural realities that outline two different responses to world market demand, which are partly due to specific rural histories. In terms of energy supply, Terceira and Viterbo dairy farms use the same amount of input but in monetary terms the level of input is more than double in Viterbo (€1651 ha−1 versus €616 ha−1) which is due to the lower cost of direct energy (e.g., fuel) on the island. The use of direct energy input (fuel, electricity and lubricants) on the farms in Viterbo decreases in mixed farm systems and is at its minimum on dairy farms. On the other hand, the use of indirect energy input (fertilizers, herbicides, pesticides, seeds and feedstuffs) is greater on Terceira farms compared with those in Viterbo (0.76 versus 0.60, respectively). Generally speaking, the crops grown on Terceira are not diversified and this has caused environmental issues on the island due to the milk production that is mainly exported. In Europe, more intellectual and financial resources for measuring and monitoring sustainability conditions in agriculture are necessary, in order to appropriately inform decision makers at both institutional and individual level.

Different theories have been posited that try to explain the decision-making process of smallholders especially regarding the adoption of new technologies or new agricultural techniques. The objective of this paper is to review and re-assess the dominant household production theories to explain the decision making of smallholders practicing conservation agriculture (CA) in the southern, eastern, and central provinces of Zambia. It also discusses the potential role of CA toward economic development. It finds that the CA smallholders studied did not aim to maximize profits but tried to secure household consumption from their own production before any other considerations in risky and uncertain environments. Their response to economic incentives was contingent on minimizing risks associated with securing a minimum level of livelihood and investing into local forms of insurance. This paper concludes that the ability for CA to contribute to rural livelihoods and economic development would depend on how adequately the factors that hinder smallholder agricultural development in general are addressed.